Paper-bag machine



(No Model.) 2 Sheets-Sheet l.

W; B. PURVIS. PAPER BAG MACHINE.

NA 519,349 Patented May 8, 1894..

/N VEN T015 fus NATmNAL LmwGnAPHINa COMPANY. wAsHlNaToN, u. c.

(No Model.) Y 2 Sheets-Sheet 2.

W. B. PURVIS.

PAPER BAG- MACHINE.

No. 519,349.` Patented May 8,1894.

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WILLIAM R. PURvIs, OE PHILADELPHIA, PENNSYLVANIA, AssIeNOR To THE I EASTERN PAPER BAC. COMPANY, OE HARTFORD, CONNECTICUT.

" PAPER-RAGMAol-HNE.

SPECIFICATION forming part of Letters Patent No. 519,349, dated May 8, 1894.

Application rledAprn 25. 189s.

serial Nt. 471.748. (Numan.)

To @ZZ whom t may concern: y Be it known that I. WILLIAM B. PURvIs, of the city and county of Philadelphia, and State of Pennsylvaniahave invented an Improvement in Paper-Bag Machines, of which the following is a specication. n My invention relates to machines for mak- Ing paper bags, and consists of certain improvements which are fully set forth in the following specification and shown in the accompanying drawings. My invention relates to machines for fold- Ing the ends of a paper tube into the proper folds for making the bottoms of paper bags, and 1s especially concerned with forming the bottom which is commonly known as a Satchel square bottom from a bellows side fold tube.`

The present invention is an improvement upon the invention disclosed `in my applicatlon, Serial-No. 441,005, filed July 23, 1892.

The invention which forms the subject matter of that application is a machine in which the paper bellowsside fold tube is carried be` tween reciprocating sectional suction formers, which, during their reciprocations, are caused to move apart or open up, carrying the paper which adheres to their perforated suction faces with them and thus opening out the end of the bag and breaking down or forming the paper into the proper folds for the Satchel square bottom. The square box shaped bottom thus formed is attened down, and the formed tube passes to the pasting devices Where the fiaps are pasted in the usual manner. As the suction formers are moved apart during their reciprocation through the machine, the sectional portions are moved with reference to one another so as to assume differentangular positions. This action opens the end of the tube and forms the diamond folds in the sides, which result from the box shape imparted to the end of the tube. The perfection of the shaping of the square box shape depends largely upon the accuracy with I which the sides of the tube are broken into the diamond folds; and the present invention is designed to assist the suction of the moving formers in forming these diamond folds by means of positively acting mechanical folders.

vthepulley F. l

-In the accompanying drawings I have shown a machine of the character described with my improvements for forming the diamond folds ing my `improvements applied to it. Fig. 2 isl a plan view of the same, omitting such `parts as are unnecessary to anexplanation of the present invention. Fig. 3 is a detail view of the sectional suction formers and their carriers. Fig. 4c is a perspective view`of one of the suction formers. Fig. 5 is an enlarged plan view of a portion of the same. a perspective view of the suction formers in the act of forming the square bottom illustrating the operation of my improvement for forming the diamond side folds. Figs. 7, 8, 9, and l0 are perspective views of the bellows side fold paper tube illustrating successive steps in the formation of the Satchel square bottom. i

For the purpose of rendering my improvements more clear, I shall first describe the general construction of the machine to which my improvements areapplied.

A is the frame of the machine. B are guide frames upon the top of the frame A provided with suitable guideways b.

C, C, are two transversely arranged slidingy carriers movable in the guideways b and located one above the other. These carriers are separated slightly from one another to admit the paper tube sections between them, and are vheld i together in their reciprocations.

The carriers C, C are reciprocated back andk forth in the guides b `by levers D connected by a cross bar E and driven from a shafteby lGr is a feeding chute or guide in the front of the machine, through which the tube sections are fed between the carriers C, C.

' II, H are the suction formers carried by the carriers C, C and reciprocated with them. These suction formers each consist of two hollow box Ashaped sections H', H2 hinged to gether as at h and provided with perforated Fig. 6 is faces d', d2. The sections H2 are hinged as at h to the carriers C, C.

I are flexible tubes connecting each of the sections of the formers H, H with a suction flue J, in which suction is created by a fan or other suction creating device. During the reciprocation of the formers H, H the sections H', H, and H2, H2 are caused to move apart or open, and the paper of the tube section which is held against their perforated faces by the suction from the Hue .I is bent into the proper folds. The sections H and H2 of the formers are caused to move apart or open up by stationary cam arms M, M and N, N carried by the frame and located above and below the guideways b against which fingers L, L and O, O, carried by the sections H,-H and H2, H2 respectively, are guided and retained in contact by springs f. When the carriers C, C and their formers H, H are in a position to receive the tube sections from lthe guide G, the adjacent faces of the carriers C, C, are brought together to clamp the body of the tube section, with the end which is to be formed projecting between the formers H, H. This clamping of the carriers C, C together may be accomplished by pivoted spring fingersP located on each side of the machine near the front thereof and adapted to act upon the lower face of the under carrier C and raise it. When the lower carrier C is raised by the ngers P it is locked to the up per carrier by pawls Q carried by the upper carrier and engaging with the lower one.

Q are cams upon each side of the frameB near the rear thereof, so located that when the carriers C, C have reached substantially the limit of their forward reciprooation and the formers have folded the end of the tube section, they will act upon the pawls Q, Q to move them out of engagement with the lower carrier C and thus permit that carrier to drop and release the tube section, which is then.

Stripped off and carried to the pasting devlces.

R, R are hinged folding wings carried by one of the carriers Gand located on each side 4adjacent to the formers H, H.

S, S are springs carried by the frames B, B adjacent to the rear thereof and projecting from each side into the space between the frames, adapted to act upon the hinged wings R, R and close them down upon the opened formers to complete the folding of the bottom.

T is a blower located at the rear end of the machine adapted to blow a blast of air into the opened end of the tube section and thus aid the formers in breaking itinto the square box shape.

U, U are the stripping rollers by which the folded tube sections are carried off to the pasting devices. The sect-ions may be guided or fed to the rollers U, U in any convenient manner. The tube sections are fed in succession through the chute or guide G in any convenient manner. v A tube section thus fed. passes between the carriers C, C and formers H. Where the tube section is introduced betweenv the carriers C, C, the lower carrier is lifted by the fingers P and locked by the pawls Q, clamping the body of the tube between the carriers C, C with the end which is to be folded lying between the formers H. As the carriers and formers are moved forward the sections are moved apart by the action of the fingers L, L, and O, O upon the cam arms M, M, N, N. The two sections H', l-I2 of one former are first caused to separate from the two sections H H2 of the second former, drawing the two faces of the paper with them and partially opening the end of the paper tube. As the reciprocation of the formers continues the sections H and H2 of each former are caused under the action of the cam arms M and N, to assume an angular position with reference to one another, the sections H assuming horizontal positions and the formers H2 gradually taking vertical positions. In Fig. 6 the sections are shown as they are assuming these positions. This action of the former section causes the end of the tube to assume the open square box shape and at the same time forms the diamond shape side folds 3, 3. continue to reciprocate the sections H', H are caused to assume a vertical position, drawing out the faces of the tube, and the wings R, Rthen fold down upon it flattening it`into the final position shown in Fig. l0. Figs. 7 to lO show successive steps in the formation of the bottom. Fig. 9 shows the end of the tube in the square box shape.

I have now described in a general way the construction and operation of the machine to which my improvements are applied.

For greater particularity with regard to that machine reference may be had to my application, No. 441,005, heretofore referred to.

I shall now particularly describe the construction and mode of operation of my improvements.

V, V are two pivoted folding fingers carried by each former adjacent to the hinged point between the sections H and H2, preferably on a' stud or projection u carried by the sections H2 on each side, and movable across the face of the sections H2.

V are springs carried by the sections H2 and acting on the fingers V, as upon pins 'u' carried thereby/to normally hold the ends of fingers o ut so as not to extend over the faces of the sections H2, as is shown in Fig. 5.

W are spring pins carried by the studs or projections o and located so as to act upon the rear ends of the fingers V. These pins are normally held out of action by the rear portions of the fingers V which extend over the pins when the lingers are in their inactive positions, as shown in' Fig. 5. When however the fingers are moved upon their pivots so as to throw their front ends over the faces of the sections H2, the rear ends are moved out from over the pins, which are projected by their springs w and thus act to lock the fin- As the formers roo iro

gers against returning to their former inact` springs to and depress them, retracting the ive positions under the action of the springs V.

t Located in the rear of the frame ofthe ma` chine are projections W when the formers reach guides,

which are adapted, that portion of the to strike the free extended ends of the pins Wand unlocking the fingers V and permitting them to be moved back into the position shown in Fig. under the action of the springs V.

X are hooks or fingers carried by the sides of the stationary frame adapted'to catch the rear ends of the fingersV, as they are moved with the formers and to throw them in over the face of the sections Ilias is shown in Fig. 4t. The fingers V may be provided with pins to engage the hooks or fingers X. t These fingers or hooks X are so located that they will act upon the ingersVwhen the formers reach that position `in their reci procations that they are in the act of forming the square box shape on the end of the tube. At this moment they engage the free ends of the, fingers and move them inwardly over the paper into the diamond side fold, as is shown in Fig. 6. This inward movement ofthe fingers into the open sides ofthe tube assists the formers in properly shaping the angular creases which compose the diamond sidefolds and prevents rumpling of the paper or the formation of improperly shaped creases. The instant that the fingers V, V are so operated, the pins W` are released and lock the fingers against moving back until the square box shape is fully imparted to the end of the papertube, when the projections W act upon the springs w and retract the pins W, permitting the springs V to move the fingers Vback outof the diamond side folds, so that the papermay be finally iattened out by the opening ofthe sections H', H', and the folding down of the Wings or folders R, R. v It will be understood that the present invention is in no way to be limited to thespecific features of construction of the paper bag machine to which it has been shown as applied nor to any of the minor details of construction herein shown, as the invention contemplates broadly the combination with reciprocating formers which are moved apart during their reciprocations to shape the end of a papertube into a satchel square bottom, of movable folding fingers which are `operated'to enter the fold.

sides of paper tube while it is being opened by the reciprocation of the formers andassist the formers in the formation of the bagbottom.

2. In a paperb'ag machine, the combination' with reciprocating formers by which the paper tube is carried, and mechanism to move the formers apart during their reciprocations, of folding fingers carried bythe formers, and, mechanism to actuate the folding fingers during the reciprocation of the formers to act upon the sides of the paper tube and assist in the formation of the shape of the bottom.

3.` In a paper bag machine for forming satchel square bottom bags, the combination with reciprocating sectional suction `formers by which the paper tube is carried,and mechanism to cause the formers to move apart during their reciprocations, of pivoted folding fingers carried by one of the sections of each former, and mechanism adapted to act upon the folding lingers during their reciprocation to move the fingers over the face of the section by which they are carried and assist the formers in forming the square box with reciprocating sectional suction formers by which the paper tube is carried, and mechanism tocause the formers to move apart duringtheir reciprocationsof pivoted folding fingers carried by one of the' sections of each former, mechanism adapted to act upon the folding fingers during their reciprocation to move the fingers over the face of the section by which they are carried and assist the formers in forming the square box shape on the end of the paper tube, and springs to normally hold the lingers outof action untilthey are acted upon by said. mechanism.`

5. `In a paper bag machine for forming satchel square bottom bags, the combination with reciprocating sectional suction formers by which the paper tube is carried, and mechanism to cause the formers to move apart during their reciprocations of pivoted folding iingerscarried by one of the sections of each former, mechanism adapted to act upon the folding fingers during theirreciprocation to move the lingers overthe face of the section IOO by which they are carried and assist the form- K ers in forming the square box shape on the end of the paper tube, and a lock to holdl said finger when they are operated.

6. In a paper bag machine forV forming satchel square bottom bags, the combination with reciprocating sectional suction formers by which thepaper tube is carried, and mechanism to cause the formers to move apart during their reciprocations, of pivoted folding fingers carried by one of the sections of each former, and mechanism adapted to act upon the folding fingers during their reciprooation to move the fingers over` the face of the sec- `tion by which they are carried and assist the formers in forming the square box shape on the end of thepaper tube, a lock to hold said fingers when vthey are operated, and devices to operate the lock and release the fingers.

7. In a paper bag machine for forming Satchel square bottom bags, the combination with reciprocating sectional suction formers by Which the paper tube is carried, and mechanism to cause the formers to move apart during their reciprocation, of pivoted folding iingerscarried by one of the sections of each former, and actuating fingers adapted to act upon said folding fingers andA operate them during the reciprocation of the formers to act upon the sides of the paper tube and assist in the formation of the square box shape upon the bottom of the tube.

S. In a paper bag machine, for forming Satchel square bottom bags, the combination with reciprocating sectional suction formers by which the paper tube is carried, and mechanism to cause the formers to move apart during their reci procation, of pivoted folding fingers carried by one of the sections of each former, springs to normally hold said fingers out of action, and actuating fingers adapted to act upon Said folding lingers to operate them during the reciprocation of the formers to act upon the sides of the paper tube and assist in the formation of the square box shape upon the bottom of the tube.

9. In a paper bag machine for forming Satchel square bottom bags, the combination with reciprocating sectional suction formers by which the paper tube is carried, and mechanism to cause the formers to move apart during their reciprocation, of pivoted folding fingers carried by one of the sections of each former, actuating lingers adapted to act upon said folding fingers and operate them during the reciprocation of the formers to act upon the sides of the paper tube and assist in the formation of the square box shape upon the bottom of the tube, and locking devices to locl said fingers when they have been operate 10. In a paper bag machine for forming Satchel square bottom bags, the combination With reciprocating sectional suction formers by which the paper tube is carried, and mechanism to cause the formers to move apart during their reciprocation, of pivoted folding lingers carried by one of the sections of each former, actuating fingers adapted to act upon said folding fingers and operate them during the reciprocation of the formers to act upon Satchel Square bottoms on paper tubes, the

combination with reciprocating sectional suction formers by which the tube is carried, and mechanism to move the formers apart during their reciprocations, of the pivoted folding fingers V carried by the formers, springs acting on the fingers to hold them normally out of action, and stationary actuating fingers X to act upon the pivoted folding fingers V and actuate them to act upon the side folds of the paper tube While it is being opened by the formers and to assist in the formation of the square box shape on the tube end.

12. In a paper bag machine, the combination With suction formers, between which the end of the paper tube to be form ed is received, consisting of hinged sections, and mechanism to move said formers apart and vary the anguiar relative relation of their sections so as to form the end of the tube in the manner described, of movable folding fingers actuated to move over the faces of the suction formers as they are opened, to assist the suction of the moving formers in shapin g the side creases in the bellows side fold of the paper tube.

In testimony of which invention I have hereunto set my hand.

WILLIAM PURVIS.

Witnesses:

ERNEST HOWARD HUNTER, I-I. L. MOTHERWELL. 

